Migrated several tests from blink to V8 repository.

test/webkit/for-in-cached.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+description(
+"This tests that for/in statements behave correctly when cached."
+);
+
+function forIn1() {
+    var result = [];
+    var o = { x: 1 };
+    for (var p in o)
+        result.push(p);
+    return result;
+}
+forIn1();
+Object.prototype.y = 2;
+shouldBe("forIn1()", "['x', 'y']");
+delete Object.prototype.y;
+
+function forIn2() {
+    var result = [];
+    var o = { x: 1, __proto__: null };
+    for (var p in o)
+        result.push(p);
+    return result;
+}
+forIn2();
+shouldBe("forIn2()", "['x']");
+
+function forIn3(proto) {
+    var result = [];
+    var o = { x: 1, __proto__: proto };
+    for (var p in o)
+        result.push(p);
+    return result;
+}
+forIn3({ __proto__: { y1: 2 } });
+forIn3({ __proto__: { y1: 2 } });
+shouldBe("forIn3({ __proto__: { y1: 2 } })", "['x', 'y1']");
+
+forIn3({ y2 : 2, __proto__: null });
+forIn3({ y2 : 2, __proto__: null });
+shouldBe("forIn3({ y2 : 2, __proto__: null })", "['x', 'y2']");
+
+forIn3({ __proto__: { __proto__: { y3 : 2 } } });
+forIn3({ __proto__: { __proto__: { y3 : 2 } } });
+shouldBe("forIn3({ __proto__: { __proto__: { y3 : 2 } } })", "['x', 'y3']");
+
+function forIn4(o) {
+    var result = [];
+    for (var p in o)
+        result.push(p);
+    return result;
+}
+var objectWithArrayAsProto = {};
+objectWithArrayAsProto.__proto__ = [];
+shouldBe("forIn4(objectWithArrayAsProto)", "[]");
+objectWithArrayAsProto.__proto__[0]=1;
+shouldBe("forIn4(objectWithArrayAsProto)", "['0']");
+
+function forIn5(o) {
+    for (var i in o)
+        return [i, o[i]];
+}
+
+shouldBe("forIn5({get foo() { return 'called getter'} })", "['foo', 'called getter']");
+shouldBe("forIn5({set foo() { } })", "['foo', undefined]");
+shouldBe("forIn5({get foo() { return 'called getter'}, set foo() { }})", "['foo', 'called getter']");
+
+function cacheClearing() {
+    for(var j=0; j < 10; j++){
+        var o = {a:1,b:2,c:3,d:4,e:5}
+        try {for (i in o) { delete o.a; o = null; throw "" };}finally{continue}
+    }
+}
+
+cacheClearing()